All pediatric patients will undergo a complete physical examination emphasizing diagnosing organic illness and FGID according to the international ROME classification. Routine laboratory will be done. A protocol to identify somatic causes is part of the study. In addition, parents will complete validated questionnaires regarding their child`s physical/psychological health, temperamental characteristics and social skills and also psychosocial conditions concerning them selves. Self-report regarding the same aspects will be obtained from children above 8-9 years.